I'm here every day. Its the first tab i open in my browser, and check once or twice through the more (more so the last day or so since everyone started talking again).
Whilst I'm a member of a ton of FB groups, I have most of them muted as all you generally see are post after post of loose figures. So whilst FB is more active, its more active with crap. Obviously not all groups fall under that label, Franks Baggietastic group is clearly an exception to that with interesting stuff and information being posted a lot.
Purchasing wise, FB did become the go to place for me 2014-2016.. I very quickly picked up most of the MOCs I needed, with ease for good prices. Nowadays the FB groups are swamped with people, things sell the instant they are listed and are massively overpriced a lot of the time in my opinion (the problem being, people pay those inflated prices and things become the norm).
This forum is still the place for useful information and friendly, helpful chat. You don't get swamped with memes and nonsense here.